Buckle



FIG. 1 is a perspective view of a buckle showing my new design;

FIG. 2 is a right side view of the buckle of FIG. 1, the left side view being a mirror image thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a front view thereof; and,

FIG. 6 is a rear view thereof.

The broken line showing of a ring, shown in FIGS. 1-6, is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a buckle, as shown and described. 